The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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A COMPARATIVE STUDY ON THE WEAR RESISTANCE OF POLYMERIC VENEERING MATERIALS

치관 전장용 레진의 내마모성에 대한 비교연구

  • Youn, Soo-Sun (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Lee, Sun-Hyung (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Yang, Jae-Ho (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Chang, Wan-Shik (Department of Prosthodontics, College of Dentistry, Seoul National University)
  • 윤수선 (서울대학교 치과대학 보철학교실) ;
  • 이선형 (서울대학교 치과대학 보철학교실) ;
  • 양재호 (서울대학교 치과대학 보철학교실) ;
  • 장완식 (서울대학교 치과대학 보철학교실)
  • Published : 1986.12.01
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Abstract

The purpose of this study was to compare the wear resistance of heat pressure-cured microcomposite(SR-Isosit-N), photo-cured microcomposite(Dentalcolor), unfilled heat-cured resin(Thermojel) and that of human enmel. Specimens were made with specially designed die and finally polished with #3,000 diamond paste. After 100,000 strokes of tooth brushing at electric tooth-brushing machine, mean thickness loss of each specimen was measured by using surface profile and integration. The results were as follows 1. Mean thickness loss were $84.3{\pm}27.3{\mu}m$ in unfiled heat-cured resin, $9.4{\pm}2.5{\mu}m$ in photocured microcomposite, $7.6{\pm}2.1{\mu}m$ in heat.pressure-cured microcomposite and $0.97{\pm}0.42{\mu}m$ in enamel. 2. Heat.pressure-cured microcomposite and photo-cured microcomposite had no difference in mean thickness loss(p>0.05). 3. Unfilled resin and microcomposite had much differences in mean thickness loss (p<0.005). 4. ha resins used in this experiment had too much mean thickness loss as compared with enamel (p<0.005).

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